Comment 44 for bug 119730

Hi,

I'm apparently impacted this bug as well:

uname:
Linux mail 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686 GNU/Linux

root@mail:~# hdparm -tT /dev/sdd

/dev/sdd:
 Timing cached reads: 534 MB in 2.00 seconds = 266.84 MB/sec
 Timing buffered disk reads: 306 MB in 3.01 seconds = 101.70 MB/sec
root@mail:~# hdparm -tT --direct /dev/sdd

/dev/sdd:
 Timing O_DIRECT cached reads: 160 MB in 2.01 seconds = 79.63 MB/sec
 Timing O_DIRECT disk reads: 328 MB in 3.01 seconds = 109.11 MB/sec

dd, cp and rsync top out at write of 33mbs

General system description (see attached tarball for detailed files):

Motherboard: ASUS a7m266-D
CPU: Dual AMD Althon 2.8 (Barton core)
Memory: 3gb
Disk controller 1: Promise tx2 SATA 150+ (holds individual data disks: 400gb PATA UDMA 133, 400GB SATA 150. Sits on 64bit 66mhz bus, runs at 66mhz, 32 bits
Disk controller 2: Promise tx4310 (holds four Segate 500 gb sata 3gb es.2 class drives). Sits on 64bit 66 mhz bus, runs at 66mhz, 32bit
Disk controller 3: AMD motherboard PATA channel 0 disabled, Channel 1 holds a pata udma/66 cd rom

NB: the dmesg shows allot of mdadm software raid activity -- I discoved the problem while benchmarking a new software raid array. The problem occurs regardless of where I copy the file to -- individual drive, part of the array, two drives ont eh same card or one drive on a sata card and one drive on the amd pata (not shown in dmesg).

So yes, the problem seems to exist on ubuntu 8.04.

Sam S.